Stapling machine



March 7, 1950 G. BERGER 2,499,843

STAPLING MACHINE Filed March 23, 1945 INVENTOR George Berger BY ATTORNEY Patented Mar. 7, 1950 UNITED STATES ATENT OFF ICE STAPLING MACHINE George Berger, New York, N; Y., assignorto Arrow Fastener 00., Brooklyn',.N. Y., apartnership Application March 23, 1945, Serial No. 584,322

9 Claims.

A further object of this invention is to provide a machine of the character described in which the plunger or driver is a right-angle member fixed to the lever by arivetand provided with a foot adapted to aid" in retaining the spring in place.

A still further object of this'invention is to provide in a machine of the character described, a staple magazine having side walls formed with aligned, inclined notches, and a strip spring, one

endof which is engaged within the notchesto i retain the spring in position between the magazine and the-lever.

A still further object of this invention is to provide a strong, rugged and durable magazine of the characterdescribedwhich shall be relatively inexpensive to manufacture, sure and positive in operation, and yet practical and efiicient to a high degree in use.

Otherobjects of this invention will in part be obvious and in part'hereinafter pointed out.

The invention accordingly consists in the-features of construction, combinations of elements, and arrangement of parts which will be exemplified in the construction hereinafter described, and of which the scope of application will be indicated in the following claims;

In the accompanying drawing, in which .is shown one of the various possible illustrative embodiments of this invention,

Fig. 1 is aside elevational view of a staple machine embodying theinvention. with parts broken away and in cross-section;

Fig. 2is' a. cross-sectional view taken on line 2-2 of Fig. 1;.

Fig- 3 is a perspective view of: the staple magazine-by itself;

Fig: 4 is iaperspectiveview of the base for the coil spring interposed between the staple magazine and the cover;

Fig. 5 is. a-partial view similar to Fig. l and illustrating a modified construction for elevating the stapling arm;

Fig. 6 is a perspective view of the spring used in the modification of'Fig. 5; and

Fig. 7 is a partial perspective view' of the magazineemployed in the spring of Fi 5;

Referring now in detail'to the drawing, to designates a staplemachine embodying the invention. The same-comprises abase- I I, a'staple magazine [2 pivoted thereto, and a-lever l3 'pivoted to the-staple magazine. The base ll is provided with an anvil 14; At the rear end of base ll are-upstandingsidewalls l5 carryinga horizontal pivot pin l5; Riveted' to the upper 1 surface of base ll adjacent its rear end, as at H, is a strip spring 18 inclined upwardly-and forwardly and engaging the underside ofthe staple magazine l2;

The staple magazine l2 comprises a bottom wall 9 and'side walls 20 and afront wall2i. Extending downwardly from the rear ends of side walls are ears 22 formedwithopenings 23 to receive the transverse pivot pin l6.

Attached to the upper side of bottom wall 19 is a rail member 25 on which the staple strip 25"is mounted. The staples Ziiare pushediorwardly'by a channel shaped slider 21 slidably mounted on member '25.- The slider-2'! is'formed with upstanding ears Eilreceiving a rod.3l. The rod 32 is formed with a hook32 at itsrear'end adapted to-engage within a notch 33 at therear end of staple magazine: l2. On rod .3! is "a coil compressionspring 34'adapted to pushthe'slider 2.! forwardly for pressing the staples against the front wall 2! of the magazine. The side wall'szZO :of the magazine are furthermore formed adjacenttheifront end 21 with a-pair of aligned notches orgrooves .36 for-the purpose :hereinafter appearing.

At the rear. ends of side-wallsZfl are pivot openings 31'113018061176 a-transverse pivot pin 38 which serves to :pivotally-connect the lever- 13 to the magazine; The lever or cover I3.-has a top wall 4|] and downwardly extending-sidewalls 4i reeeivingthe magazine- I2 therebetween. At the front end of the cover I3is. a front wallM. The side walls are for-medzwithbearing openings to receive the pivot pin 38. 1

Fixed to the underside .of .coverwmember- I3 is. a plungermember 50. Member 50 comprises a portion 5i contacting the underside of wall 40 and a downwardly extending plunger portion 52 contacting the inner side of front wall 2| of the staple magazine. Portion 5! is fixed to the cover 40 by means of a rivet 53. On top of the cover is a knob 54 fixed to the cover and to member 50 by said rivet 53. If desired, the knob may be riveted to the cover by a separate rivet.

Means is provided to cause relative rotation between the cover member and the staple magazine. To this end there is mounted on the staple magazine, a plate member 55. Member 55 comprises a plate formed with notches 56 in its four corners thereby producing a pair of opposite projections 5'! received in the notches 36 of the side walls of the staple magazine. Punched upwardly from member 55 is a central tongue 58. On member 55 is a coil spring Gil contacting the underside of the cover ill. The top wall 40 of the cover may be formed with a downwardly pressed tongue 83 received within the coil to guide the same. The tongue 56 projects into the lower end of the coil. The lowermost convolution of the coil spring may be threaded through the opening 58a in plate 55 formed by punching the plate 55 upwardly.

In Figs. 5, 6 and 7 there is shown a staple magazine Illa covering another embodiment of the invention. The machine Illa is similar to machine l except for the changes pointed out hereinafter. The staple magazine of machine Illa does not have the notches 36. Instead it is formed at about its mid-portion or somewhat closer to its rear end, with a pair of upwardly and forwardly inclined slots 10. The coil springs 65 and plate 55 of Fig. l are replaced by a strip spring ll formed at its rear edge with corner notches 12. The side edges 13 of spring H engage within notches in. The tongue 14 at the lower end of spring 1! is received between the side walls of the staple magazine. The upper end '15 of the spring is curved somewhat downwardly and engages the underside of top wall 48 of cover l3. The plunger member is also somewhat differently constructed than in Fig. l. The same comprises a member 80 made of a strip of spring steel. Member 80 comprises a portion 8! contacting the underside of top wall 40 of the cover and riveted to the cover and to the knob by rivet 82. Extending downwardly from the front end of portion 81 is a plunger portion 83 for driving the staples one at a time. Extending from the rear end of portion BI is a downwardly extending lip 85 somewhat spaced from the front end of spring H when the lever is raised. Should spring II have a tendency to move forwardly, the lip 85 will contact the front edge of the spring to retain the rear end of the spring within the notches '15. Lip 85 thus serves to aid in keeping the spring II in assembled relation relative to the staple magazine.

It will thus be seen that there is provided a device in which the several objects of this invention are achieved, and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiment above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limitin sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. In a staple machine, a staple magazine having side walls formed with forwardly and upwardly extending aligned notches, a lever pivoted to the staple magazine, a, strip spring removably interposed between said lever and magazine and having a portion received within said notches, and a portion contacting the underside of the lever.

2. In a staple machine, a staple magazine having side walls formed with forwardly and upwardly extending aligned notches, a lever pivoted to the staple magazine, a strip spring removably interposed between said lever and magazine and havin a portion received within said notches, a portion contacting the underside of the lever, and a plunger member comprising a portion contacting the underside of the lever and riveted thereto, and a portion extending downwardly from the first portion of the plunger for driving staples.

3. In a staple machine, a staple magazine having side walls formed with forwardly and upwardly extending aligned notches, a lever pivoted to the staple magazine. a strip spring having a portion received within said notches, a portion contacting the underside of the lever, a plunger member comprising a portion contacting the underside of the lever and riveted thereto, a portion extending downwardly from the first portion of the plunger for driving staples, and a lip extending from said first portion adapted to retain the spring within said notches in the magazine.

4. In a staple machine, a staple magazine, a lever pivoted thereto, a strip spring detachably engaging said magazine, and contacting the underside of the lever, and a staple driver fixed to the underside of the lever and provided with means to retain said spring in engagement with said magazine.

5. In a staple machine, a staple magazine having side walls formed with notches, a lever pivoted to the staple magazine, and a spring disposed between the lever and the staple magazine and detachably engaged within said notches and interposed between said magazine and lever.

6. In astaple machine, a staple magazine hav- 45 ing side walls formed with notches, a lever pivoted to the staple magazine, a spring disposed between the lever and the staple magazine and detachably engaged within said notches and interposed between said magazine and lever, and means on the 50 lever to drive a staple from the magazine, comprising a plunger fixed to the lever and disposed between said spring and the front end of the staple magazine.

7. In a staple machine, a staple magazine hav- 55 ing side walls formed with upwardly and forwardly inclined aligned notches, a lever pivoted to said magazine, a strip spring formed at its lower corners with notches, the side edges of said strip spring being received within said notches in 60 the side walls of the magazine, the portion between the notched corners of the strip spring constituting a lip received within the side walls of said magazine.

8. In a staple machine, a staple magazine having side walls formed with upwardly and forwardly inclined aligned notches, a lever pivoted to said magazine, a strip spring formed at its lower corners with notches, the side edges of said strip spring being received within said notches 0 in the side walls of the magazine, the portion between the notched corners of the strip spring constituting a lip received within the side walls of said magazine, the upper end of said strip spring being curved downwardly and forwardly and engaging the underside of said lever.

9. In a staple machine, a staple magazine hav- REFERENCES CITED mg slde. Walls formed Wlth upwardly The followin references are of record in the wardly inclined aligned notches, a lever pivoted file of this to said magazine, a strip spring formed at its lower corners with notches, the side edges of said 5 UNITED STATES PATENTS strip spring being received within said notches in Number Name Date the side Walls of the magazine, the portion be- 602,971 Young 26 1898 tween he notched corners of the strip spring con- 2,218934 Germain Oct 1940 s itutine" a lip received within the side walls of 2,279,534 vogel 14 1942 said ma azine, the upper end of said strip spring in 2,312142 Abrams Feb 1943 bein curved downwardly and forwardly and en- 2,354,760 lmdstrom Aug. 1, 1944 easin he underside of said lever, and means on 2432853 Barclay 16 1947 said lever to retain said spring within the notches of the side walls of the magazine.

GEORGE BERGER. 15 

